论文部分内容阅读
甜菜是我国重要的糖料作物之一。它的光合产物主要是蔗糖,并主要以蔗糖形态向块根运输和贮藏。甜菜虽属碳_3植物,光合强度和光能利用率低于碳_4植物,但在不同栽培条件下,甜菜的光合强度和光能利用率是有很大差别的。例如,一般生产田的净同化率为2—4克/日/米~2,光能利用率不足1%;高产田的净光合强度为7.5—10.0克/日/米~2,甚至高达12—15克/
Beet is one of the important sugar crops in our country. Its photosynthetic products are mainly sucrose, and are mainly transported and stored in the form of sucrose to roots. Although sugar beet is a carbon-3 plant, photosynthetic rate and light energy utilization rate is lower than that of carbon-4 plants, but under different cultivation conditions, the photosynthetic intensity and light energy utilization rate of beet are quite different. For example, the net assimilation rate of general production fields is 2-4 g / day / m ~ 2 and the light energy utilization rate is less than 1%. The net photosynthetic intensity of high yield fields is 7.5-10.0 g / day / m ~ 2 or even 12 -15 g /